exam Maths Puzzle Numerical Ability

please graph the ellipse x^2 + 4y^2 = 64

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exam Other Question

Tom can do a job in 3 hours, Dick in 4 hours, and Harry in 6 hours. If they do it together (and do not delay each other), how long does the job take? if tanA + secA = 2 where a is acute then which option is correct.

a) tan A < Sec A
b) Cosec A > CotA
c) Sec A > Cosec A
d) CotA > Tan A